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2.56grams of sulphur in 100ml solution shows osmotic pressure of 2.463atm at 300k.how many sulphur atoms are associated in colloidalsol?

2.56grams of sulphur  in 100ml solution  shows osmotic  pressure  of 2.463atm at 300k.how many sulphur  atoms are associated in colloidalsol? 

Grade:12

1 Answers

Vikas TU
14149 Points
5 years ago
We need to calculate first the observed molar mass.
O.P = W*R*T/(M*V)
M = WRT/((O.P)*V)
Put the values,
M = (2.56)*0.0821*300/(2.463)*(0.1)
    = 256 grams/mol.
 
Number of atomes = > 256/32 => 8.

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